docs: add invite link to support server

Author: theS1LV3R

README.md

@@ -27,6 +27,9 @@
   <a href="https://github.com/ent3r/corax-bot-nodejs-rewrite/pulls">
       <img src="https://img.shields.io/github/issues-pr-raw/ent3r/corax-bot-nodejs-rewrite.svg">
     </a>
+  <a href="https://discord.gg/feHantD3Hx">
+    <img src="https://img.shields.io/discord/771369946416152576?label=Join%20the%20discord%20server&logo=discord">
+  </a>
   </div>
 </p>